Multiplying attachment for cameras.



No. 68I,7I4. Patented Sept. 3, I90l. C. LAUX.

IULTIPLYING ATTACHIENT FOR CAMERAS.

(A umuon m Aug. 13, 1909.) (No Model.)

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UNITED STATES PATENT OFFICE.

CHRISTIAN LAUX, OF FRANKFORT-ON-THE-MAIN, GERMANY.

MULTIPLYING ATTACHMENT FOR CAMERAS.

SPECIFICATION forming part of Letters Patent No. 681,714, dated September 3, 1901.

Application filed August 18, 1900. serial No. 27,332. (No model.)

T0 on whom it may concern: Be it known that I, CHRISTIAN LAUX, a subject of the Emperor of Germany, residing at Frankfort-on-the-Main, Germany, have invented certain new and useful Improvements in Multiplying Attachments for Cameras, of which the following is a description.

The present invention relates to multiplying attachments for cameras; and it consists of the details of construction hereinafter set forth, and particularly pointed out in the claims.

In order to render the present specification easily intelligible, reference is had to the accompanying drawings, in which similar letters of reference denote similar parts throughout the several views.

7 Figure 1 is a rear elevation of the device; Fig. 2, a top plan view, and Fig. 3 a perspective view, of the same.

The apparatus relates more particularly to that class of multiplying attachments em ployed in connection with the production of stamp-photographs; and the object is to enable the plate to be partly exposed-t. 6., to enable a series of photographs to be taken on one and the same sensitive plate by successively exposing parts of its whole surface.

With this object in view the multiplying attachment consists of the back plate 6, having the orifice f therein, through which the part of the plate is exposed. A carrier-bar c at one end of the plate and a hook d at the other carry a permanent stationary trans verse bar 6, having inwardly-directed springbows e thereon, adapted to retain the holder at against the plate g, but at the same time to allow it to be shifted on the same by external pressure on the said holder. The photographic-plate holder a is provided with a series of parallelly-disposed guide-strips b b, which are mounted at a distance apart corresponding to the width of the spring-bow e. W hen the plate is inserted in the holder a, the top part of the space between the first two guide-ribs is placed under the springbow e in front of the opening f and the whole inserted in the camera and exposed. The attachment is then withdrawn from the camera after exposure and the sensitive plate is moved along in the holder, so that the next part of the space inclosed between the first two guide-strips b is exposed, and so on until the whole first strip of the sensitive plate has been exposed. The holder is then shifted so that the spring-bow e will lie between the second and third guide-strips, and this strip of the sensitive plate is then stepwise exposed in the same manner, and so on until the whole sensitive plate has been covered.

I claim as my invention 1. In a multiplying attachment for cameras the combination of a cross-bar having on the inner side thereof spring-bows and a sensitive-plate holder having on its back a series of parallelly-disposed guide-ribs between which the said spring-bow engages in the manner and for the purpose substantially as described.

2. In a multiplying attachment for cameras the combination of a plate 9 having a carrierbar 0 thereon, a transverse bar e having inwardly-turned spring-bows e and a hook cl to retain said how in position, and a photographic plate holder located beneath said transverse bar and having a series of ribs at the back between which said spring-bow may engage substantially as described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

CHRISTIAN LAUX.

Witnesses WOLDEMAR HAUPT, GUSTAV ZSCI-IOKKE. 

